Manganonema kitasatoi, Leduc, Daniel, 2015

Leduc, Daniel, 2015, One new genus and five new nematode species (Monhysterida, Xyalidae) from Tonga and Kermadec Trenches, Southwest Pacific, Zootaxa 3964 (5), pp. 501-525 : 517-518

Species Manganonema kitasatoi n. sp. M. rowdeni n. sp. M. majusculum n. sp.

Males Females Males Females Male Females

Holotype Paratype Paratypes Holotype Paratype Paratypes Paratype Holotype Paratype

- 2 2 - 1 2 1 - 2

1219 1275, 1279 1114, 1279 1298 1417 1851, 1873 1984* 1969 1737, 2084

39 40, 44 36, 39 31 35 42, 51 52* 53 50

8 8 7, 8 7 9 10, 12 9* 7 7

9 9 8, 10 10 12 15, 16 9 * 7 5

Head diam. (cephalic setae) 5 5 4, 5 5 5 5 8 5 4, 5

Head diam. (amphideal fovea) 16 16 14, 17 16 16 18, 19 24 24 24, 23 Length of sub-cephalic setae 2 2 2 1 1 1, 2 2 2 2

Length of cephalic setae 3 2, 3 2-4 2 2 2, 3 4, 5 3, 4 4, 5

Length of outer labial setae 3 2, 3 2 2 2 2 3, 4 3 3, 4

Amphideal fovea height 10 12, 13 10, 11 9 10 9 24 21 21, 18 Amphideal fovea width 12 12 10, 11 8 8 9 18 18 17

Amphideal fovea width/cbd (%) 75 75, 81 65, 71 50 50 47, 50 75 75 71, 74 Amphideal fovea from anterior end 29 31, 35 26, 35 26 26 32, 33 36 51 45, 37 Nerve ring from anterior end 91 89 82, 89 123 93 97 - 170 155, 149 Nerve ring cbd 26 25 24 38 31 30 - 34 34, 41 Pharynx length 151 152, 159 156, 160 184 160 156, 182 219 287 236, 227 Pharynx width at base 15 12, 18 15, 16 27 23 20 22 20 20, 27 Pharynx cbd at base 30 27, 29 29, 31 41 38 37, 40 38 37 35, 41 Max. body diam. 31 29, 32 31, 33 42 41 37, 44 38 37 35, 48 Spicule length 11 10, 13 - 29 28 - 30 - -

Anal body diam. 22 22, 24 22, 23 30 34 25, 27 30 37 22, 28 length 137 142, 149 113, 156 126 123 113, 126 216* 284 330, 322 length/abd 6.2 5.9, 6.8 5.1, 6.8 4.2 3.6 4.2, 5.0 7.2* 10.5 15.0, 11.5

- - 684,772 - - 1087,1102 - 1083 934,1207 V - - 60, 61 - - 58, 60 - 55 54, 58 Vulval body diam. - - 31, 33 - - 29, 37 - 33 28, 43

distinguished from the former by the absence of somatic and caudal setae (present in M. rowdeni n. sp.), amphideal fovea size (0.65–0.81 vs 0.47–0.50 cbd), tail length (5.1–6.8 vs 3.6–5.0 abd), and spicule length and shape (0.45– 0.54 vs 0.95 abd; conical vs needle-shaped). M. kitasatoi n. sp. can most easily be distinguished from M. majusculum n. sp. by the shorter body length (1114–1279 vs 1737–2084 µm), absence of somatic and caudal setae (present in M. majusculum n. sp.), and shorter tail (5.1–6.8 vs 10.5–15.0 abd).